What just happened...

[et5k1ng]

So, im a seller of CS:GO Steam accounts

A one guy bought my steam account for 15$ on ebay

I give him the password and username of my account

But then ebay said that the card which he was using was stolen or something like that

And they got my money back

Wha the **bleep**, now i  don't have my money and i don't have account

What should i do?

[kernowlass]

@et5k1ng

If the payment was made via a stolen card or paypal account then of course the genuine card and account holder files a dispute and gets the money back.

BUT you would be reimbursed if you met all the criteria of seller protection.

However there is no paypal seller protection for digital / virtual items, you can sell them but at your own risk.

[Niigel]

Unfortunately, there's not going to be much recourse for you here.  or on Ebay.

Seller protection won't apply on a digital/virtual code/ item/ etc.

You could try to recover the account with Steam, but eBay won't intervene on that.  

I would try submitting the issue to Steam directly, and get them to help.  They just might.